Development of a Focused Broadband Ultrasonic Transducer for High Resolution Fundamental and Harmonic Intravascular Imaging

Intravascular ultrasound (IVUS) is increasingly employed for detection and evaluation of coronary artery diseases. Tissue Harmonic Imaging provides different tissue information that could additionally be used to improve diagnostic accuracy. However, current IVUS systems, with their unfocussed transducers, may not be capable of operating in harmonic imaging mode. Thus, there is a need to develop suitable transducers and appropriate techniques to allow imaging in multi modes for complementary diagnostic information. Focused PVDF TrFE transducers were developed using MEMS (Micro-Electro-Mechanical-Systems) compatible protocols. The transducers were characterized using pulse-echo techniques and exhibited broad bandwidth (110 at -6dB) with axial resolutions of Such promising results suggest that focused, broadband PVDF TrFE transducers have opened up the potential to incorporate harmonic imaging modality in IVUS and also improve the image quality. In addition, the transducer\u27s multimodality imaging capability, not possible with the current systems, could enhance the functionality and thereby the clinical use of IVU

Development of a Focused Broadband Ultrasonic Transducer for High Resolution Fundamental and Harmonic Intravascular Imaging

Intravascular ultrasound (IVUS) is increasingly employed for detection and evaluation of coronary artery diseases. Tissue Harmonic Imaging provides different tissue information that could additionally be used to improve diagnostic accuracy. However, current IVUS systems, with their unfocussed transducers, may not be capable of operating in harmonic imaging mode. Thus, there is a need to develop suitable transducers and appropriate techniques to allow imaging in multi modes for complementary diagnostic information. Focused PVDF TrFE transducers were developed using MEMS (Micro-Electro-Mechanical-Systems) compatible protocols. The transducers were characterized using pulse-echo techniques and exhibited broad bandwidth (110 at -6dB) with axial resolutions of Such promising results suggest that focused, broadband PVDF TrFE transducers have opened up the potential to incorporate harmonic imaging modality in IVUS and also improve the image quality. In addition, the transducer\u27s multimodality imaging capability, not possible with the current systems, could enhance the functionality and thereby the clinical use of IVU

The Typological Characteristics of Maithili

Typological studies have always been fascinating the linguists as it paves the way not only for the proper classification of a language but also in defining and re-defining several language universals. Sometimes, this study becomes the main cause of the establishment of a new language universal. Indian languages have always been showing some of the unique features which make these languages distinct from many other languages of the world. The similarities among the Indian languages are found due to long area contact and sharing of features. Maithili is an Indo-Aryan and a scheduled language of India. It is spoken in the north-eastern part of the Bihar state of India and in the tarai region of Nepal. It is the 16th most spoken language of India and the 40th most spoken language of the world. The present paper takes into account some of the major typological features of Maithili languages in order to test its similarities and dissimilarities with other Indian languages. Some of the discussed features in this paper include the basic word order, the position of adjective, auxiliary verb, main verb, adverb, direct and indirect objects, interrogation, negation, anaphora, reduplication and echo-formation, etc. At the same time, this paper also makes a comparative study of Maithili with the other South-Asian languages. Finally, it also discusses some of the unique features of Maithili which requires further investigation

Exploring the Earlier Studies Related to Verbal Morphology of Maithili: A Brief Review

Maithili is an Indo-Aryan and a scheduled language of India. It is spoken in the north-eastern part of the Bihar state of India and in the tarai region of Nepal. It is the 16th most spoken language of India and the 40th most spoken language of the world. The present paper forms a part of my Ph.D. thesis which attempts to revisit the major earlier works related to verbal system of Maithili. It also investigates the way how Maithili verbs have been treated by many Linguists and points out the facts that appears quite unconvincing and further leads us to a direction in which the study of the morphology of Maithili verbs becomes a matter of reinvestigation. There are certain quarries made in this paper which makes the study highly fascinating

Development of a Focused Broadband Ultrasonic Transducer for High Resolution Fundamental and Harmonic Intravascular Imaging

Intravascular ultrasound (IVUS) is increasingly employed for detection and evaluation of coronary artery diseases. Tissue Harmonic Imaging provides different tissue information that could additionally be used to improve diagnostic accuracy. However, current IVUS systems, with their unfocussed transducers, may not be capable of operating in harmonic imaging mode. Thus, there is a need to develop suitable transducers and appropriate techniques to allow imaging in multi modes for complementary diagnostic information. Focused PVDF TrFE transducers were developed using MEMS (Micro-Electro-Mechanical-Systems) compatible protocols. The transducers were characterized using pulse-echo techniques and exhibited broad bandwidth (110 at -6dB) with axial resolutions of Such promising results suggest that focused, broadband PVDF TrFE transducers have opened up the potential to incorporate harmonic imaging modality in IVUS and also improve the image quality. In addition, the transducer\u27s multimodality imaging capability, not possible with the current systems, could enhance the functionality and thereby the clinical use of IVU

Multidimensional Focus on Linguistic Landscape at Tourist Places: A Case Study of Mumbai

Tourism and language are closely related. A language not only serves as a Communication Tool (CT) between hosts and guests but also can be developed into tourist attractions. Tourism Development (TD) has proved to have important impacts on languages. The present study attempts to fill this gap by investing the impacts of tourism on the Hindi, English and Marathi language in Mumbai, one of the most famous tourism destinations in India.  Hindi seems to be widely used at public places. Linguistic Landscape (LL) refers to the written languages used in public spaces, such as road signs, warning signs, private business signs, etc. Linguistic Landscape (LL) analysis has become the central theme of this study

Development of a Physical Therapy Telehealth Examination Battery for People with Parkinson Disease

Scope: The rapid transition to telehealth following the COVID-19 pandemic raised challenges for remote delivery of physical therapy. One challenge was identifying outcome measures for people with Parkinson Disease (PwP) that could safely be conducted via telehealth. This paper evaluates the feasibility of a telehealth physical therapy examination battery for PwP in early to middle stage of disease progression. Methodology: We reviewed recommended outcome measures from the American Physical Therapy Association’s Academy of Neurologic Physical Therapy (ANPT) Parkinson Evidence Database to Guide Effectiveness (EDGE) document and evaluated their appropriateness for remote administration. A clinical decision tree was created to streamline the examination process, incorporating elements of the ANPT movement analysis of tasks as a movement screen. The examination battery was then conducted on three PwP and evaluated for safety and feasibility. Conclusion: This physical therapy telehealth examination battery provides physical therapists with a method to conduct safe and efficient remote assessments for PwP

A flexible strain-responsive sensor fabricated from a biocompatible electronic ink via an additive-manufacturing process

Biosensor technologies are of great interest for applications in wearable electronics, soft robotics and implantable biomedical devices. To accelerate the adoption of electronics for chronic recording of physiological parameters in health and disease, there is a demand for biocompatible, conductive & flexible materials that can integrate with various tissues while remaining biologically inert. Conventional techniques used to fabricate biosensors, such as mask lithography and laser cutting, lack the versatility to produce easily customisable, micro-fabricated biosensors in an efficient, cost-effective manner. In this paper, we describe the development and characterisation of an electronic ink made from an environmentally sustainable copolymer - x-pentadecalactone-co-e-decalactone, (PDL) incorporating silver nanowires (AgNW), which are known for their antimicrobial and conductive properties. The composites were shown to possess a low percolation threshold (1% w/w of AgNW to PDL), achieve a low electrical resistance (320 +/- 9 O/sq) and a high electrical capacitance (2.06 +/- 0.06 mF/cm2). PDL nanocomposites were biocompatible, demonstrated in vitro through the promotion of neural adhesion and prevention of astrocyte activation. An optimised ink formulation was subsequently used to fabricate strain-responsive biosensors with high spatial resolution (sub-100 mm) using a direct write additive manufacturing process. Using a customized in vitro set-up, the sensitivity of these biosensors to biologically-relevant strains was assessed under simulated physiological conditions for 21 days. Critically, these 3D printed biosensors have applications in chronic prophylactic monitoring of pressure changes within the body and related pathologies.This publication has emanated from research conducted with the financial support of the Science Foundation Ireland (SFI) Technology Innovation Development Programme, grant no. 15/TIDA/2992 and was co-funded under the European Regional Development Fund under Grant Number 13/RC/2073 and the Hardiman PhD Research Scholarship from the National University of Ireland, Galway. This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 713690. The authors acknowledge the facilities and scientific and technical assistance of the Centre for Microscopy & Imaging at the National University of Ireland Galway, a facility that is funded by NUIG and the Irish Government's Programme for Research in Third Level Institutions, Cycles 4 and 5, National Development Plan 20072013.r The Basque Government GV/EJ (Department of Education, Linguistic Politics and Culture) is also acknowledged for financial support to the consolidated research groups project IT927-16 (UPV/EHU, GIC/152)

Design and Analysis of MEMS Based PVDF Ultrasonic Transducers for Vascular Imaging

Polyvinilidene fluoride (PVDF) single-element transducers for high-frequency (>30 MHz) ultrasound imaging applications have been developed using MEMS (Micro-electro-Mechanical Systems) compatible techniques. Performance of these transducers has been investigated by analyzing the sources and effects of on-chip parasitic capacitances on the insertion-loss of the transducers. Modeling and experimental studies showed that on-chip parasitic capacitances degraded the performance of the transducers and an improved method of fabrication was suggested and new devices were built. New devices developed with minimal parasitic effects were shown to improve the performance significantly. A 1-mm aperture PVDF device developed with minimal parasitic effects has resulted in a reduction of insertion loss of 21 dB compared with devices fabricated using a previous method

MEDIA PEMBELAJARAN INTERAKTIF IPA KELAS 3 SD SEMSTER 2 TENTANG GERAK BENDA

Under Law No. 20 Year 2003 on National Education System states that learners should develop the potential for him to represent the spiritual power of religion, self-control, personality, intelligence, noble character, and skills needed him, society, nation and state. To achieve these points, the government made education curriculum guiding the learning process. In third grade elementary school curriculum, there is material on object motion. The material is part of the Natural Science subjects in second semester.The existence of interactive multimedia learning (MPI) can help teachers to design learning creatively. With the creative design of learning expected learning process into an innovative, exciting, more iterative, more effective, the quality of student learning can be enhanced learning, teaching and learning can be done anywhere and at any time, and the attitude and interest in students learning can be improved